Step 1: Place the tomato juice, mezcal or vodka, lemon juice, horseradish, sriracha, and Worcestershire sauce in the bottom of a bar shaker and stir well to mix.

Step 2: Cover the top of the shaker with plastic wrap, leaving one edge open for the rubber tube from the Smoking Gun. Insert the tube and fire the Smoking Gun to fill the shaker with smoke. Quickly remove the hose and seal the top of the shaker with plastic. Let stand for 3 minutes, then uncover and stir in the smoke with a bar spoon. Repeat once more or until the desired degree of smokiness is achieved.